Dan_Lorenze

Dad, you won't need to buy a topclamp if you're sticking with your stock Renthals.. The only time you'll need to get a TC is when you switch to 1 1/8 (fatbar standard). If you want to simply add a stabilizer you'll need a new bar clamp that has holes for the stabilizer to mount.

DesertWR

I just put a GPR on my '05. It will fit with stock Renthals. They had to tweak the crossbar a little and change the clamps but those come with the stabilizer. If you switch bars, you'll have to change the triple clamp.